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Graham: GOP Race is 'Romney's to Lose'

Sen. Lindsey Graham echoed the word coming out of Mitt Romney's campaign, saying that the former Massachusetts governor has already locked up the nomination in terms of delegates. However, Graham insists that it's not over yet.

"Mathematically, this thing is about over, but emotionally it’s not," he said on ABC's This Week.

Though he hasn't endorsed a candidate in the GOP race yet, Graham said on Sunday that the race was "Romney's to lose." "Quite frankly, every time [Romney] had his back against the wall, he’s performed," he said.

Graham also credited Rick Santorum for "starting with almost nothing and being a real contender" and to Newt Gingrich for "com[ing] back from the dead two or three times," but he said an end may be in sight for the drawn-out primary contest.

"If Romney does well, wins either Mississippi or Alabama and wins Illinois, then I think it's virtually impossible for this thing to continue much beyond early May," he said.